PBDB Taxon

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Frechites occidentalis

Cephalopoda - Ceratitida - Ceratitidae

Taxonomy

Ceratites occidentalis was named by Smith (1914). It is a 3D body fossil. Its type locality is Divide between Troy Canyon and South Fork of American Canyon (occidentalis), which is in an Illyrian marine limestone in Nevada.

It was recombined as Frechites occidentalis by Spath (1934), Silberling and Nichols (1982).

Synonyms

Ceratites applanatus was named by Smith (1914). It is a 3D body fossil. Its type locality is Divide between Troy Canyon and South Fork of American Canyon (occidentalis), which is in an Illyrian marine limestone in Nevada.

It was synonymized subjectively with Frechites occidentalis by Silberling and Nichols (1982).
Ceratites rotuloides was named by Smith (1914). It is a 3D body fossil. Its type locality is Divide between Troy Canyon and South Fork of American Canyon (occidentalis), which is in an Illyrian marine limestone in Nevada.

It was recombined as Frechites rotuloides by Spath (1934); it was synonymized subjectively with Frechites occidentalis by Silberling and Nichols (1982).
Ceratites altilis was named by Smith (1914). It is a 3D body fossil. Its type locality is Divide between Troy Canyon and South Fork of American Canyon (occidentalis), which is in an Illyrian marine limestone in Nevada.

It was recombined as Frechites altilis by Spath (1934); it was synonymized subjectively with Frechites occidentalis by Silberling and Nichols (1982).
Ceratites gilberti was named by Smith (1914). It is a 3D body fossil. Its type locality is Divide between Troy Canyon and South Fork of American Canyon (occidentalis), which is in an Illyrian marine limestone in Nevada.

It was synonymized subjectively with Frechites occidentalis by Silberling and Nichols (1982).
Ceratites karpinskyi was named by Smith (1914). It is a 3D body fossil. Its type locality is Divide between Troy Canyon and South Fork of American Canyon (occidentalis), which is in an Illyrian marine limestone in Nevada.

It was recombined as Frechites karpinskyi by Spath (1934); it was synonymized subjectively with Frechites occidentalis by Silberling and Nichols (1982).
Ceratites pilatus was named by Smith (1914). It is a 3D body fossil. Its type locality is Divide between Troy Canyon and South Fork of American Canyon (occidentalis), which is in an Illyrian marine limestone in Nevada.

It was recombined as Frechites pilatus by Spath (1934); it was synonymized subjectively with Frechites occidentalis by Silberling and Nichols (1982).
Ceratites (Hollandites) organi was named by Smith (1914). It is a 3D body fossil. Its type locality is Divide between Troy Canyon and South Fork of American Canyon (occidentalis), which is in an Illyrian marine limestone in Nevada.

It was recombined as Frechites organi by Spath (1934); it was synonymized subjectively with Frechites occidentalis by Silberling and Nichols (1982).
Ceratites (Gymnotoceras) spurri was named by Smith (1914). It is a 3D body fossil. Its type locality is Divide between Troy Canyon and South Fork of American Canyon (occidentalis), which is in an Illyrian marine limestone in Nevada.

It was recombined as Gymnotoceras spurri by Bychkov et al. (1976); it was synonymized subjectively with Frechites occidentalis by Silberling and Nichols (1982).

Synonymy list

Year	Name and author
1914	Ceratites applanatus Smith p. 80 figs. Pl 53, figs 9-14
1914	Ceratites rotuloides Smith p. 80 figs. Pl 47, figs 1-10
1914	Ceratites altilis Smith p. 83 figs. Pl 45, figs 14-22; pl 66, figs 19-21
1914	Ceratites gilberti Smith p. 84 figs. Pl 98, figs 1-3
1914	Ceratites occidentalis Smith p. 84 figs. Pl 44, figs 21-28; pl 45, figs 1-13
1914	Ceratites karpinskyi Smith p. 100 figs. Pl 44, figs 4-20
1914	Ceratites pilatus Smith p. 102 figs. Pl 46, figs 1-16; pl 89, figs 10-13
1914	Ceratites (Hollandites) organi Smith p. 105 figs. Pl 54, figs 1-9; pl 55, figs 1-30
1914	Ceratites (Gymnotoceras) spurri Smith p. 112 figs. Pl 67, figs 16-18
1934	Frechites altilis Spath
1934	Frechites karpinskyi Spath
1934	Frechites occidentalis Spath
1934	Frechites organi Spath
1934	Frechites pilatus Spath
1934	Frechites rotuloides Spath
1976	Gymnotoceras spurri Bychkov et al.
1982	Frechites occidentalis Silberling and Nichols p. 30 figs. Pl 13, figs 31-34; pl 14, figs 1-33

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Cephalopoda	Cuvier 1797

Rank	Name	Author
subclass	Ammonoidea	()
order	Ceratitida	Hyatt 1884
superfamily	Ceratitoidea	(Mojsisovics 1879)
family	Ceratitidae	Mojsisovics 1879
subfamily	Beyrichitinae	()
genus	Frechites	Smith 1932
species	occidentalis	()

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Frechites occidentalis Smith 1914

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Invalid names: Ceratites (Gymnotoceras) spurri Smith 1914 [synonym], Ceratites (Hollandites) organi Smith 1914 [synonym], Ceratites altilis Smith 1914 [synonym], Ceratites applanatus Smith 1914 [synonym], Ceratites gilberti Smith 1914 [synonym], Ceratites karpinskyi Smith 1914 [synonym], Ceratites pilatus Smith 1914 [synonym], Ceratites rotuloides Smith 1914 [synonym]

Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	6	26.4	20.0	42.0	25.0	7.76
shell diameter	6	56.6	42.0	85.0	52.5	15.5
shell inflation	6	12.5	10.0	18.0	12.2	2.82

Composition:

aragoniteo

Environment:

marinec

Locomotion:

actively mobileo

Life habit:

nektonico

Diet:

carnivoreo

Vision:

well-developedc

Created:

2005-01-28 02:33:06

Modified:

2005-10-06 16:36:47

Source: o = order, c = class

References: Kiessling 2003, Kiessling 2004

Age range: Illyrian or 243.33000 to 241.46400 Ma

Collections (19 total)

Time interval	Ma	Country or state	Original ID and collection number
Anisian	246.7 - 241.464	Svalbard and Jan Mayen (Barentsøya)	Hollandites organi (212892)
Anisian	246.7 - 241.464	Svalbard and Jan Mayen	Hollandites organi (212789 212937 212969)
Anisian	246.7 - 241.464	Russian Federation	Gymnotoceras spurri (107040)
Illyrian	243.33 - 241.464	USA (Nevada)	Ceratites applanatus, Ceratites rotuloides, Ceratites altilis, Ceratites gilberti, Ceratites occidentalis, Ceratites karpinskyi, Ceratites pilatus, Ceratites organi, Ceratites spurri, Frechites nevadanus, Ceratites emmonsi (type locality: 142671) Ceratites organi (33270) Frechites occidentalis (33198 38927 38930 44154 57089 142859 142860 142870 143018 143025 143031)
Illyrian	243.33 - 241.464	Russian Federation	Hollandites organi (214884)